Differentiate between two classes of vertebrata i.e Reptilla and Aves

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Solution

Birds Reptiles
They are endothermic or warm-blooded animals. They are ectothermic or cold-blooded animals.
They have scales as well as feathers on their bodies. They only have scales on their bodies.
They have a four-chambered heart. They have a three-chambered heart (except crocodiles).
Their eggs have an air-space and have to be turned during incubation. Their eggs lack any air spaces and do not require to be turned during incubation.

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Similar questions

What are differences between the following:
(a) Cartilaginous fishes and bony fishes;
(b) Amphibia and Reptilia;
(c) Aves and mammals.

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Birds	Reptiles
They are endothermic or warm-blooded animals.	They are ectothermic or cold-blooded animals.
They have scales as well as feathers on their bodies.	They only have scales on their bodies.
They have a four-chambered heart.	They have a three-chambered heart (except crocodiles).
Their eggs have an air-space and have to be turned during incubation.	Their eggs lack any air spaces and do not require to be turned during incubation.